I don't have any personal experience with this unit but from looking at it on their website
I would not purchase this unit.
Take a look at a cut-away of this unit.
Clearly, most of the water that the pump sucks in bypasses the protein skimmer altogether and goes right back into the tank. Even if the design of the protein skimmer was good (which it doesn't appear to be due to the undersized skimmer reaction area), this unit is sucking in water from the bottom of the tank instead of the surface of the water. Obviously, that's problematic because skimmable organics are hydrophobic. Therefore they are going to be located on the surface of the water and never get skimmed.
The sponges used for biological filtration could work but are on the small size for housing beneficial bacteria. However, there are problems there too. It looks nearly impossible to remove them for cleaning without disassembling the whole thing.
The way the carbon is situated is definately not ideal for chemical filtration. Running carbon passively is not the best way to use it and I can't think of a more passive way to run it as there is no possibility of flow through the carbon packet.
Lastly if you look at their testimonials
doesn't it strike you as a bit odd that most of them are from their dealers (who of course want to sell it $$$) with the exception of two customers who didn't leave their last name
In tank skimmers are usually the worst of the bunch and you would be far better off spending that $300 on a quality sump skimmer like the AquaC EV 120
which is one of the best for the $$$.